Home / 21,300.40-29,397.62-12,799.72

Finding the Fourth Proportional to 21,300.40, 29,397.62 and 12,799.72

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Solution

The fourth proportional to 21,300.40, 29,397.62 and 12,799.72 is: 17,665.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,300.40 : 29,397.62 = 12,799.72 : x
  2. Step 2: Convert to fraction form
    21,300.40/29,397.62 = 12,799.72/x
  3. Step 3: Cross multiply
    21,300.40x = 29,397.62 × 12,799.72
  4. Step 4: Simplify right side
    21,300.40x = 376,281,093.68
  5. Step 5: Solve for x
    x = 376,281,093.68/21,300.40
  6. Step 6: Final answer
    x = 17,665.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.